cancelling a reservation

I posted a listing on Booking.com, but then after looking more closely, decided I did not want to have my property on booking.com.  I tried to delete it, but with no success.  I even sent an email to somewhere, but heard nothing back.  Yesterday I received a notification I had a new booking.  I do not want this booking, nor any future bookings through this site.  How do I delete my property from the site?